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agentx.sale AI Keyword Extraction
x402
agentx.sale AI Keyword Extraction is a paid API for AI agents from agentx.sale, paid per call via x402, $0.9/call, status unknown (last checked 2026-10-21).
Extracts top salient keywords and key phrases with relevance scores from supplied text, and detects the language.
Price / call$0.9
Success—
StatusUnknown
How this service works
AI keyword extraction from supplied text: top salient keywords and key phrases with scores, language detected. POST JSON {text, maxKeywords?} (max 24k chars)
Output
Returns a ranked list of the most salient keywords and key phrases found in the input text, each with a relevance score, plus the detected language of the text. The number of keywords returned is bounded by the optional maxKeywords parameter (default behavior applies if omitted).
Example use cases
SEO keyword research from content
“Extract the top 15 keywords from this blog post draft so I can identify the main SEO terms to target: 'Sustainable fashion is rising in popularity as consumers become more conscious of environmental impact, choosing organic materials and ethical brands over fast fashion.'”
Content tagging for a news article
“Give me the most salient keywords and phrases from this news story — I want to use them as tags for my CMS. Here's the text: 'The Federal Reserve raised interest rates by 25 basis points today, citing persistent inflation concerns and a strong labor market.'”
Topic fingerprinting for a research abstract
“What are the top 8 key phrases in this research abstract, and what language is it written in? 'Les réseaux de neurones profonds ont révolutionné la vision par ordinateur, permettant des progrès significatifs dans la détection d'objets et la segmentation d'images.'”
Technical details
Endpoint
POSThttps://agentx.sale/x402/keywords?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need fast, scored keyword and key phrase extraction from arbitrary text with automatic language detection, especially within agentic workflows that require paid-per-call access via the x402 protocol. It is well-suited for content tagging, SEO analysis, document summarization support, or routing decisions based on text topics. Prefer this over a full topic classification endpoint when you need ranked term-level granularity rather than category labels.
Side effects
- Text exceeds 24,000 character limit — request rejected
- Empty or missing text field — validation error
- maxKeywords value out of expected range — may be ignored or clamped
- Non-text binary content submitted — poor or empty results
- Network timeout or upstream AI model failure — 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | |
| maxKeywords | number |
Output
Schema · Response
{
"type": "json",
"example": {
"keywords": [
"renewable energy",
"solar"
]
}
}Tags
x402
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